TDEE calculator
How many calories you burn in a day, from your body, your job and your training. Free, and no sign-up needed.
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See how FuelKey worksHow it works
1. Resting burn
Mifflin-St Jeor: the most accurate of the common formulas, from height, weight, age and sex.
2. Your job and moving around
Resting burn times how active your job is: from 1.15 for mostly sitting up to 1.60 for physical work.
3. Training
A little more for each training day: from 5% for 1-2 days a week up to 18% for every day.
What TDEE means
TDEE (total daily energy expenditure) is everything you burn in a day: keeping you alive at rest, moving around at work and at home, and training. Eat about your TDEE and your weight holds steady. Eat about 500 calories a day under it and you lose about a pound a week.
Your job is counted separately from your training on purpose. A desk worker who lifts five days a week burns very differently from a nurse who doesn't train at all, and one "activity level" can't tell them apart.
Common questions
How accurate is a TDEE calculator?
Any formula is a starting estimate and can be off by 10% or more for a given person. The real test is your weight trend over two to three weeks. FuelKey's weekly review makes that adjustment for you from your own logs, in small steps, and asks before it changes anything.
Should I eat my TDEE?
To hold your weight, yes. To lose, eat under it: the calorie deficit calculator works out how much, and when you'd reach your goal. To gain, eat a little over it.
Why does the training part look small?
A training session burns less than most people expect, often 200 to 400 calories. Your resting burn and your daily movement are most of your day.
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Not medical or dietary advice. These are estimates from standard formulas. If you are pregnant, under 18, have a medical condition or take medication that affects appetite or weight, check with your doctor before changing how you eat.